Drinking straw



FIG. 1 is a left side view of a drinking straw showing my new ornamental design, the right side being identical;

FIG. 2 is a front elevational view thereof, the rear view being identical;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a perspective view thereof seen from the top, front and right side. 

The ornamental design for a drinking straw, as shown and described. 